Heineich ease



(No Model.)

No. 325,113. Patented Au 25, 1885.

UNITED STATES PATENT Orrrcn HEINRICH BABE, OF HANAU, PRUSSIA, GERMANY.

ELECTRIC IMPULSION DEVICE FOR A TORSlON-PENDULUM.

CFECIFICATION forming part of Letters Patent No. 325,113, dated August 25, 1885.

(X0 model.)

T 0 at whom it may concern.-

Be it known that I, HEINRICH BABE, a subject of the King of Prussia, residing at Hanau, in the Kingdom of Prussia, have invented a new and useful Improved Torsion-Pendulum, of which the following is a specification.

The torsion-pendulum,driven by electricity and hereinafterdescribed, is based upon this: that it receives an impulse from an electromagnet when the angle of torsion has decreased to a certain degree, and the electromagnet is excited when an electric circuit, deriving current from any desired source, is automatically completed.

One convenient construction for electrically driving a torsion-pendulum is shown in the accompanying drawings, in which Figure 1 is front View of the pendulum; Fig. 2, asection on line A B of Fig. 1; Fig.3,

aside elevation; Fig. 4, a section on line C D, Fig. 3. Figs. 5 and 5 show details of the controlling device.

a is the torsion ribbon or strip. This consists, as is well known, of a strip of steel or other suitable material. It is suspended in the wcltknown manner at the top and c011- neeted with a clock-work or other mechanism requiring to be regulated. the torsiolrribbon ct is clamped by a clamping device, I), to the rod 0, upon which latter a weight, G, is placed. This weight may consist of any suitable metal or stone. In the lower part of the weight G and in the same plane with the poles at m of an electro magnet, hereinafter l'nentioned, is placed an armature, d, (see Figs. 1, 2, 3, 4,) made of iron and let into a recess traversing the lower face of the weight G diametrically.

m m are thepoles of an electro-magnet, and the direction of the electric current, generated by a battery or otherwise and serving to excite the magnet, is shown by arrows, Figs. 1 and 3.

The weight G rotates, as already stated and with as little clearance as possible, between the poles at an in such a manner that the armature d is in one plane with these latter, Figs. 1 and 2.

The contact device by which the completion of the circuit is effected by the pendulum itself, and automatically whenever required, is arranged as follows: On the rod 0 an arm, 01,

The lower end of i is fixed, which is adjustable both vertically and horizontally, and maintained in position by a set-screw. On the forward end of this arm a a prismatic or wedge-shaped piece, 1), Figs. 1, 2, 3, 4, 5, 5, is loosely fixed so as to be capable of turning on a hinge. This piece 20 by its own weight always tends to assume a vertical position. I The conducting-wire coming from the coils of the pole m of the electromagnet is suitably connected with a spring, q, which on its forward end carries a small trough, the hollow part of which is preferably Vshape. (See Figs. 5 and 5%) Two contact springs, as, are also provided on the said spring q, and these, when pressed downward, bear upon the oblique surfaces of a wedge, t. The wedge 15 is fixed on a metal angle-piece, which is electrically connected with the wire which leads to the conducting-wire.

The operation is as follows: WVhen the angle of torsion is sutficently large, the prismatic piece, which hangs very loosely on the arm a, slides over the trough 1" without depressing the trough or spring (1, and as the contact-springs s s do not touch the wedge, Fig. 5, the current is interrupted. \Vhen, however, in time the angle of torsion becomes so small that reversal of the direction of rotation of the pendulum takes place, the prismatic piecep presses upon the trough r and spring (1 by assuming the position shown in Fig. 5. By this means the contact-springs s s touch the wedge t, the circuit is closed, and the poles in m attract the armature (I, thus imparting a fresh impulse to the pendulum.

Having now described my said invention, I wish it to be understood that what I claim, and desire to protect by United States Letters Patent, is

1. In combination, a torsional pendulum, a radial arm secured thereto, a pendant loosely pivoted thereto, and a spring circuit-closer set in the path thereof and at such a relation thereto that it will be operated to close the circuit only when the pendant is in its vertical position, as set forth.

2. In combination, the torsional pendulum, the stem 0, the radial arm n thereon, the pendant p, pivoted to said arm, the spring q, having trough 1' and springs s s, and the wedge t, as and for the purpose set forth.

8. A torsional pendulum provided with an armature, an eleetro-magnet having its poles in the same plane with said armature, and a circuit-closing mechanism attached to the penfllulum, operative to close the circuit only in 5 the position which the pendulum assumes at the end of a retarded stroke, whereby electrical impulse is given at that time, as set forth.

4. A torsional pendulum having a radial 1o arm attached adjusta-bly thereto and a circuitelosing device pendent from said arm, whereby the time of giving the electrical impulse may be accurately adjusted, as set forth.

In testimony whereof I have hereunto set my hand in the presence of two sulsnihing 15 witnesses.

HEINRICH RAPE. lVitnesses:

A. S. HoGUu, J. GRUND. 

